Pheneos is located in Arcadia on the Peloponnese. Since 2011 archaeological excavations have been carried out along its fortification wall. This paper investigates the findings of a trench, which was laid out at the easternmost part of the known fortification wall. The deposit is more recent than the fortification wall itself, which was built some time after 345 BCE. The pottery has been divided into fabric groups, which provides a first idea of the materials characteristics. The diagnostic sherds have been recorded by archaeological drawings and detailed descriptions in the catalogue. The pottery is broken into small fragments and is generally in bad condition, nonetheless the forms and dates of the fragments have been assigned by comparison with parallel finds when possible. No pottery production from the plain of Pheneos was hitherto known. However, the prominence of two fabric groups suggests that a pale yellow to pale brownish, black-glazed pottery was produced locally. Additionally, a base sherd of a skyphos demonstrating errors in production supports this theory. Except for a few prehistoric sherds, the pottery in the deposit dates from the 6th to the 3rd cent. BCE. All analysed stratigraphic units of the trench do not show distinctive differences concerning their pottery, thus it seems reasonable to interpret them as one single act of levelling on the inner side of the fortification wall. The material of the deposit examined in this paper contains fragments that can be associated with the sanctuary, which was excavated further southwest in the immediate vicinity of the trench. The deposit is interpreted as debris; therefore, these findings uphold the existing hypothesis that the ritual practices experienced a restriction due to the construction of the fortification wall.